Grinding-machine.



B. R. BROWN. GRINDING MACHINE. APFLIOATIGN FILED AUG. 27, 1912.1,068,973. Patented July 29, 1913.

2 SHEETS-SHEET 1 Chilh'oweeQin' thevcou nty if-Johnson and.

ot iihich thefollowing The; presentti iii ent-ion provides a" inachineii pressed so as to, automatically hold the wheels in engagement with thetive "vicw oiia combjined 'knife and sheargrinding machine eniboding theim ention. v Fig. 2 1s a froiitv e'w oftlie machine show;-

The inventio'nhas-relatioiij to. a. machine of the characterhereinbeforjes tatedwhich is simple in its gne'ral sti 'ucture' andemodies'two grindi'i gi'vilheels which are'spring neiiiamm n. anoint, orcnimiowna. misso um.

" emumfi'o -iintcmua i e l e ##5 Patented JiiiYZi), 1 913;

IA iicatiop'nieiihu iist'a'i,i912. seriaimi'i'imsgii a cit iz'en of theUnited States; residing at.

useful Im provei'nnts in Gri riding-Machines,

as ijecifieation shears, a guide-I.being-supplied to. hold either aknife or the hear? blade in. proper -p0S ltion duringtlie;grindingerisharpening opgrinding I surface of the'blade to besharpened.

The invention consists-of the novel features, details of constructio andcombination of parts, whichhereinaftei will be more particularly setforth, illustrated'in'tlie iiccompanying drawings; and pointed out in'.

the'fappe'nded Claim, I I Referring tothe drawlngs'r forming a part ofthe specification,Figure l is a perspecing" shear blade in position forgrinding. Fig. 3 is a sectig n on the-line re -a, of Fig. 2,v

showing a knife in position. Fig. 4 is'a section of the ma ehi-iie atright anglesto Fig- ;3, t.heshaft and gearing being Corresponding andlike parts are referred in full lines. 7

m in the =-following.deseription, and ind l cated in all the vie wsOfthe drawings, by

the same reference characters,

The mach'ne embodies a U 1, which may be ofany construction and whichhas ts lower art.

( frame has its upper end bent inwardly, as

a shear blade..4.

shown at 3,1te provide a gill; for holderfor The bent end 3in'clines'inwardly as well as transversely sothiitthe ht air pik 'v-ides--a---niaeliihe' whichbefeas lysa'i dijquicltly attached; tea 3 table;shelf or othfeifsup'portf and w'hich is}, specially adapted; forsharpening-- knives and the inclination shaped frame horizontal 'barprovided" with a clamp 2-for. securing the-machine to a; table-shelf orother neansof sup One of-the upright or side members 0 the;

shear blade may occupy'a-position'at'iinaih gleto the horizontal, whichis mo'fit'fidifl'n I ient for grinding, A shaft?) is journaled-at itsends in the upright or side ineinb'eis'ofv the frame 1 and receivesa'pair grindinglivheels 6, which-are pressed: inwai dly..to-

ings-IO formed in the inner faces-of. the grinding wheel 6; These; pins.caiise. 't lie i grinding wheels to rotate with the shaft 5. 5

The openings 10 are ofa'depth -to' ad-niit-. Qf 1 .a limited movement ofthe grindingwlieels upon the shaft so that bladesiof yii-ryiug,

thickiiess may befintroduce'd between the rinding wheels.

A blade-holder ends in the uprights or side members of the. frame 1. Acrimp or loop 12 is formed the'rod 11 in line with the space forn'ied betwcenthe grinding wheels. This crimp or loop blade 13 to be sharpened'orground,-wher'e-' as the edge portion of such blade is int'roeducedbetween the grinding Wheels' The Y crimp or loop 12 fixes the positionof the blade. tended and bent. as indicated at 14; to pro-- vide an armwhieh nay he grasped' when it'-'-' is required to turn the rod'll soilsto change.

of the crimp oi loop 12; r

be ada'pted 9 whereby theblade holder may for knives of, varying widths;The arm. .l i possesses a spring .action. and engages" the.-

adjacent .u' right of the frame lfto hold'the rod 11in t erequiredipos'it'ionv Theshatt 5 may be-rotated inenji-manQ QQ ner' andin order that the grinding-wheels may he'driven at a high speedapinion'lfi 4 is secured to a projectingend ot the shaft and isin'm'eshwith 'agear: wheel ltl'mou nted ipon a stud 17 and having ahandle .mediate: use maybe laid aside '.andf1;ihen

required for service may be-easily attaehedto a. table, projecti'ngiedgegoys el means of the damp 2.

. is locate 1 -belo\i' the shaft 5 and consists of arod 11 mounted atits 12' receives the back portionl' ofjthe j An endportion of the rod 11isfex The machine when not requiredofo'r-imf I "i -When a pairof-sc1ssorsor shears is Ito-be:

f iitcontact with the grinding wheel. Shou d 10. knife blade the latteris placed with its back in tlie crimp onloop 12 of the blade, holder thearticle to be sharpened consist of a and with itsedge; portion betweenthe gr ndingr'wheels, which latter are rotated in themanner stated, theblade being tion 'of theedge in position tobe properly ground.

- From the foregoing description, taken in connection with theaccompanying draw-v ings, the advantages of the construction and f themethodof operation will be readily apparent to those skilled in the artto which 1 the invention appertains ,vand while-Ihave described theprinciple of; operation-of the invention, together with the'devicewhichI now consider to be the, best embodiment thereof, I desire to haveit understood that the device shown is merely illustrative and that suchchanges may be made when desired asai're' within the scope of the claimappended hereto.

' movedv backward and forward to bring every p'or- Having thus describedthe invention what .is claimed as new, is':

1 In a x nachine of the character described comprisiiig a U. shapedvframe having a clamp fitted to the horizontal bar and ;having the upperend ofa side member inwardly bent, a shaft mounted in the side .members]of-the frame, a. pinion secured to lanen'd of the. shaft which projectsbeyond the frame, a gear wheel mounted upon the side member of the frameopposite to that having the inwardly bent end, said wheel being irrmeshwith the pinion and prmided with an operating handle, grindgearingwheels mounted upon: the shaft and hav-- ingtheir inner faces"recessed, pins set into the shaft and adapted to engage the grindf 'ingwheels to cause them to rotate with the limit their inward movement,

shaft and to expansible springs mounted upon-opposite end portions ingwheels and side members of theframe,

and -a rod mounted in the'side members of a central "point the frameandprovi'ded at with a blade holder."

In testimonfy whereof I afiix my signature in presence 0 two witnesses.

BENJ MIN R. BROWN.

Witnesses: Y i

R. E. SWEENEY,

STANLEY MCELWEE.

of the shaft between the-grind: Y i

